1) Figure out where they are and which ones are going to hit us2) Go to them long before they're going to hit us and turn them out of our path a) put a massive ship with a little maneuvering ability right next to it and let gravity do the work b) to save money, get that mass by sending up a light/empty ship and scoop up some of the shiat that's already in orbit but dead

Redirect all incoming asteroids away from the earth. Fallback plan if earth avoidance doesn't work: redirect to red states as they will be able to pray away the damage better then heathen blue staters.